198049 has 4 divisors (see below), whose sum is σ = 200836. Its totient is φ = 195264.

The previous prime is 198047. The next prime is 198073. The reversal of 198049 is 940891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165649 + 32400 = 407^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 198049 - 2¹ = 198047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198049.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284 + ... + 1429.

It is an arithmetic number, because the mean of its divisors is an integer number (50209).

2¹⁹⁸⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

198049 is a deficient number, since it is larger than the sum of its proper divisors (2787).

198049 is an equidigital number, since it uses as much as digits as its factorization.

198049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 198049 is about 445.0269654751. The cubic root of 198049 is about 58.2895744386.

It can be divided in two parts, 1980 and 49, that multiplied together give a triangular number (97020 = T₄₄₀).

The spelling of 198049 in words is "one hundred ninety-eight thousand, forty-nine".